let box1 = document.getElementById('box1');

let btn = document.getElementById('btn');

const move= {

n : 1,

lock : true,

fun :()=>{

btn.onclick = ()=>{

if(move.lock){

move.lock = false;

if(move.n ==1){

box1.style.transition = 'left 2s linear 0s';

box1.style.left = '1000px';

move.n = 2;

}else if (move.n == 2){

box1.style.transition = 'left 2s linear 0s';

box1.style.left = '200px';

move.n = 1;

}

setTimeout(()=>{

move.lock = true;

},2000);

}

}

}

};

move.fun();